In aluminum extrusion, a work-piece (billet) is pressed through a die with an opening
that closely resembles the desired shape of a pro le. By this process, long pro les
with an enormous variety of cross-sections can be produced to serve di erent markets
such as building, construction and transport industry. When the shape of a pro le
does not conform to the speci cations de ned by the customer, it is considered as
scrap. The reason for the shape deviations may be related to unknown aluminum
ow
through the die or unknown deformation of the die. Subsequently the die requires
correction or replacement. Here, not only aluminum but also time and energy are lost.
Currently this is the state of the art in extrusion die design. Dies are designed by so
called trial and error.
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